Rack-and-pinion mechanism.



F. M..THEISEN.

BACK AND Pmxon, MECHANISM.

APPLICATION FILED JAN.26. 1914.

1,133,415, Y Patented Mar.30,1915.-

womtoz FM.THEISEIV wi/bmeooao aff-V 31.

, v UNITED sTA'rns PATENT. OFFICE,

FERDINAND I11". THEISEN, F WAUMANDEE,

! BACK-AND-PINION MECHANISM.

Specification o1" Letters l'atent.

Pate a -30,19

Application filed January 26, 1914. Serial No. 814,472.

is a specification, reference being had-to the accompanying drawings.

This invention relates to certain improvements in rack and pinionmechanisms; and an object of the invention is to provide a device ofthis general character having novel and improved means whereby atiltable or rocking body may be swung upon its support with convenienceand facility under the influence of a reciprocating memparts ber.

With above and other objects in view, the invention consists of certainnovel details of construction and' ,'combination of hereinafter fullydescribed and claimed, it being understood that various modificationsmay be made in the minor details of construction within the scope of theappended claims.

In the accompanying'drawings illustrating an embodiment of theinvention: Figure 1 is a longitudinal sectional view illustrating atiltable body having engaged therewith an operating mechanismconstructed in accordance with my invention, said operating mechanismbeing indicated in frag-' ment; and Fig. 2 is a view in elevation of theopposite extremity of the operating member as disclosed in Fig. l and ina position different from that shown in Fig. 1, the

parts coacting with the operating mechanism being shown in elevation andin section. a

In the accompanying drawings, 17 denotes a body mounted for tilting orswinging movement. For imparting tilting or rocking movement to themember 17 in one direction, a rod 44 is pivotallv connected at one endto the rear wall of the member 17 as shown at 45 and is provided at thefront end with a rack 46 which is adapted to mesh with a pinion 47carried by the rotatablv supported shaft 30 with a resultant carrying ofthe rod forwardly whereby the member 7 is tilted or rocked. The rod isengaged with and disengaged from the pinion by means of a link 49operatively engazed to a rock lever 50 which is centrally pivoted asshown at 51 to a standard 52 carried by the-frame l0 andis equipped atthe worklng end with a guide ring 53 which enc rcles a guide rod 54 thatextends longitudinally of the top face of the rod above the rack. Uponthe link 49 being moved forwardly, the rock lever moves the roddownwardly with a resultant engagement of the rack with the pinion, theguide rod 54 freel sliding through the guide eye 5 dur ng the forwardprogress of the rod. The rod 44 also serves to maintain the member 17 inits inclined adjustmentand for this reason such rod 44 is provided ad--Jacent its forward end portion or more particularly upon the forward endportion of the guide rod 54 with the upstanding spaced lugs or prOections 56 affording a pocket or recess 57 adapted to accommodate thelug or finger 58 carried by the standard 52 and pro3ect1ng above theguide rod 54 whereby it will be seen that when the member 17 is adJustedthrough the medium of the rod 44 into an inclined position, the inner orfree end portion of such rod will be so elevated by the lever 50 as tocause the lug or finger A 58 to become seated within the pocket orrecess 57 and thereby hold the rod 44 against endwise movement and thusmaintain the member 17 in its horizontal position. When it is desired tofrom an inclined position to substantially a horizontal position, it isonly necessary that the lever 50 be adjusted to free the lug or a finger58. from the notch when, as is thought to be clearly apparent, the rodwill be free for endwise movement, it being particularly observed thatthe pinion 47 is positioned a sufficient distance below the finger orlug 58 as to warrant this second position without possibility of therack 46 becoming engaged with the pinion 47 and it is also observed thatthe guide ring 53 is of sufficient diameter as to readily permit thelugs or projections 56 to pass therethrough.

From the foregoing description, it is though to be obvious that a rackand pinion mechanism constructed in accordance with my invention is ofan extremely simple and comparatively inexpensive nature and isparticularlv Well adapted for use by reason of the convenience andfacility with which it may be assembled, and it will also be obviousthat my invention is susceptible of some change and'modification withoutmaterial departure from the principles and spirit thereof and for thisreason I do not permit the member 17 to dropwish to be understood aslimiting iniyself 1,1,: A comprising to the precise arrangement andformation of parts herein shown in carrying means foradjustingthe rackoperatively to the several out my invention in practice; a

What "s claimed is: v

, evice of the character;

movement, an extremity of said member, a driviilgpinionfor actuatingsaid rack, meansiorhdjusting said rack relative to the actuating gear,spaced member carried by the rack,

. a lug-positioned 'at'a above the" driving pinion, and meansfor out ofengagement-with isi the pinion-to position the lu 'g between theelevating the rack 'members oi the racks] l- 2.' A device of thecharacter "described comprising a member mounted fonro'eking neyj nnt;"a "rack eam; connected to a'driving pinion for actuating said rack,

' I: the driving'pinion, spaced v members carried described 1 a membermounted for rocking f a rack pivotally comIectedZ tO the"; ,rack, a lugositioned at a point a ove the driving pmlon, and means for ele- ,vatingthe racki'out. of engagement withthe pinion to position the lug betweenthe memers of the rack,'- the-1ug;being so positioned relativeto thedriving gear as tocpermit the signature in the presence of twowitnesses;

. Witnessesr 7 j- C. F. Lnn'rm,

' M. SCHMm'rKnncH'n;

theimember, adjacent the. extremity thereof,-

- FERDINANQ THEISEN',

1 rackto-move freely between the gear and v. predetermined-point p ntestimony whereof I hereiintc -afiix-any;

